CN104207039A - Processing method of dried carrot shreds - Google Patents

Abstract

The invention discloses a processing method of dry shredded carrot, which comprises the steps of peeling, cleaning, shredding, color protection, drying, packaging and sterilization, and is characterized in that: selecting fresh carrots, peeling, cleaning, cutting into carrot shreds, putting the carrot shreds into color protection liquid, completely soaking, immediately taking out, carrying out hot air circulation drying for three times, spreading and drying in the air to obtain dry carrot shreds, carrying out vacuum packaging, and finally carrying out sterilization treatment. The processing method of the dry carrot shreds has the characteristics of simple processing method, short production period, capability of keeping the appearance of the carrots, no oxidation and color change, capability of keeping the carotene and the vitamins of the carrots and the like.

Description

Processing method of dried carrot shreds

technical field

The invention relates to the field of processing agricultural and sideline products, in particular to a processing method for dried shredded carrots.

Background technique

Carrot, also known as yellow radish, calabash, red calabash, clove radish, golden bamboo shoots, red radish, umbrella-shaped rib vegetable, [Latin] Radix Dauci Sativae, is a Umbelliferae plant and a biennial herb. Carrots are rich in carotene, vitamin B1, vitamin B2, vitamin C, vitamin D, vitamin E, vitamin K, folic acid, calcium and dietary fiber, which are almost comparable to multivitamin pills. In addition, carrots also contain a large amount of phosphorus that constitutes brain cells and bone marrow cells. Carrots are rich in vitamin A, which can promote the normal growth and reproduction of the body, maintain epithelial tissue, prevent respiratory tract infections, maintain normal vision, and treat night blindness and dry eyes. . Women eat can reduce the incidence of ovarian cancer. Carrots contain potassium succinate, which helps prevent arteriosclerosis, lower cholesterol, and prevent high blood pressure.

Carrots are mainly vegetables. Carrots are used as medicines to reduce blood pressure, strengthen the heart, anti-inflammatory, anti-allergic and enhance eyesight. The mechanism of reducing blood pressure is mainly caused by its potassium salt. Invigorate the spleen and harmonize the middle; nourish the liver and improve eyesight; reduce phlegm and relieve cough; clear away heat and detoxify.

There are many ways to eat carrots, mainly in the form of eating raw, frying, boiling, etc. The form is relatively single, which cannot meet the fast-paced dietary needs of people today. Therefore, carrots need to be further processed to meet people's rich and colorful dietary needs, and dehydration and drying of carrots is a common processing method.

The traditional drying of carrots is to use natural drying or drying, and the production cycle of natural drying is long, which is not suitable for large-scale production; while the drying method uses high-temperature drying, which will brown the surface of carrots and destroy the nutritional value of carrots. The high consumption greatly increases the cost of the product, the color of the product is not good, and the quality declines.

In terms of carrot drying and processing, there are currently some scientific and technological journals and patent documents that disclose related technologies. We have extracted the following abstracts as the technical background of the present invention:

1. Chinese patent, title: A preparation method of dried carrots, application (patent) number: CN201310278075.1 publication (announcement) number: CN103385431A applicant (patent) person: Chen Wuyi address: Dashahe Town, Feng County, Xuzhou City, Jiangsu Province Resident, Inventor (Designer): Chen Wuyi, Abstract: A preparation method for dried carrots. The specific process steps are: peel the carrots, wash them, cut them into slices, then blanch and heat the carrot slices, and then Sterilize, then cool and then dry, and dry the carrots to about 50% of the remaining moisture, and then dry with hot air to obtain the dried carrot.

2. Chinese patent, title: Processing method of dehydrated carrots, application (patent) number: CN201310408663.2 publication (announcement) number: CN103461905A applicant (patent right): Xinghua Lvhe Food Co., Ltd. Address: Taizhou City, Jiangsu Province No. 1 Lvhe Road, Economic Development Zone, Chengdong Town, Xinghua City, Inventor (designer): Wang Jianshan; Wang Yichun; Yang Hongyu; Pan Jian; Zhu Renjian; Lu Xiujie, Abstract: A processing method of dehydrated carrot The processing method includes the following steps: material selection-ultrasonic cleaning and peeling-rinsing-machine cutting-manual sorting-steam explosion-drying=sorting and packaging.

3. Chinese patent, title: A processing method for dried carrots, application (patent) number: CN201310362735.4 publication (announcement) number: CN103445111A applicant (patent) person: Zhang Lanhua address: Huankou Town, Feng County, Xuzhou City, Jiangsu Province No. 104, Inventor (Designer): Zhang Lanhua, Abstract: A processing method of dried carrots, the method is to firstly peel the selected carrots and slice them, put them into boiling water for boiling, then cool them in cold water, and then place them in thick The trays are put into an oven to be baked and then dried in the open, and finally the prepared dried carrots are packaged and put into storage.

The above-mentioned documents exist that carrots are dried for a long time, so that carrots are placed in a high-temperature environment for a long time, which not only oxidizes and deteriorates carrots, but also causes the surface of carrots to fade, change color and destroy vitamins and other nutrients, thereby reducing the sensory quality and nutritional value of carrots, and even Harmful substances are produced, causing food poisoning.

It can be seen that there are some deficiencies in the existing carrot drying process, therefore, choose a process that is simple, easy to operate, and has no effect on the appearance of carrots in the drying process, and can also keep the nutrients of carrots from being destroyed. The craft of destruction is particularly important.

Contents of the invention

The purpose of the present invention is to provide a processing method of dry shredded carrots with simple process and short production cycle, which can not only keep the appearance of carrots, not oxidize and discolor, but also retain carotene and vitamins in carrots.

In order to achieve the above object, the processing method of dried carrot shreds of the present invention is characterized in that: comprising peeling, cleaning, shredding, color protection, drying, packaging and sterilization:

Described peeling is to select fresh carrots and first cut off the top leaves and root tails of carrots, and then put them into a peeling machine to peel off the epidermis;

The cleaning is to put the peeled carrots into a rolling washing machine, and roll and clean them with clear water to remove soil and impurities;

The shredded method is to put the cleaned carrots into a shredding machine, and cut the carrots into evenly sized shredded carrots;

The color protection is to put shredded carrots into the color protection solution immediately, and immediately pick up the shredded carrots after being completely submerged. The composition and mass percentage of the color protection solution are: tea polyphenol 3-5%, isoascorbic acid 2% -4%, phytic acid 1-2% and butylated hydroxyanisole 1-2%, the balance is pure water;

Described drying is three times of hot air circulation drying;

Described packing is that dried shredded carrot is put into packing machine and carries out vacuum packing;

The sterilization is radiation sterilization, and the packaged shredded carrots are put into a cobalt-60 irradiation device to irradiate the shredded carrots with 4-8kGy gamma rays.

The three drying processes of the above-mentioned shredded carrots are as follows:

For the first drying, put the shredded carrots in a dryer at a temperature of 50-80°C for 15-30 minutes. After the first drying, spread the shredded carrots evenly on a clean Spread it on the flat ground to make the shredded carrots emit hot steam and cool down as soon as possible, the time is 20-30 minutes;

For the second drying, place the shredded carrots in the dryer at a temperature of 45-70°C for 10-25 minutes. After the second drying, immediately spread the shredded carrots evenly on a clean Spread it on a flat ground to let the shredded carrots emit hot steam and cool down as soon as possible. The time is 15 to 25 minutes;

For the third drying, place the shredded carrots in a dryer at a temperature of 40-60°C for 10-20 minutes. After the third drying, immediately spread the shredded carrots evenly on a clean Spread it on the flat ground to make the shredded carrots emit hot steam as soon as possible and cool them down for 10 to 20 minutes to obtain shredded carrots with a moisture content of less than 10%.

The above-mentioned drying is hot air circulation drying, and the shredded carrots are dried 5-8 times in the dryer each time.

Compared with prior art, the beneficial effect of the processing method of dried carrot shreds of the present invention is:

1. The processing method of the present invention has short production cycle, low energy consumption and low cost, and the shredded carrots are evenly dried, and the water content of the shredded carrots after processing is below 10%, which is easy for long-term storage.

2. The present invention adopts multiple times of hot air circulation to dry at low temperature, and spreads out to air immediately after drying, so that the organic matter of carrot shreds will not be oxidized during the drying process, the color and luster will not change, and the nutrition of carrot shreds will be retained to the greatest extent , improve the sweet crisp and cool taste of carrots.

3. Soaking the color protecting solution before drying in the present invention can not only prevent and delay the oxidative deterioration of shredded carrots during drying, improve the stability of the drying process of shredded carrots and prolong the storage period of shredded carrots, but also retain carotene, vitamins and other minerals of carrots. material element.

4. The sterilization of the present invention adopts radiation sterilization. Compared with traditional food sterilization technologies such as heating and refrigeration, no chemical substances are added in the radiation sterilization process, and the heat generated is less; the radiation does not leave task residues, Does not pollute the environment; strong penetrating ability, complete sterilization.

Detailed ways

Example 1

(1) Select fresh carrots, first cut off the top leaves and root tails of carrots, and then put them into a peeler for peeling.

(2) Put the peeled carrots into the rolling washing machine, and roll them with clean water to remove the soil and impurities.

(3) Put the cleaned carrots into the shredded machine, and cut the carrots into evenly sized carrot shreds.

(4) Put shredded carrots into the color protection solution immediately, and immediately pick up the shredded carrots after being completely submerged. The composition and mass percentage of the color protection solution are: 5% tea polyphenols, 4% erythorbic acid, inositol six Phosphoric acid 2% and butyl hydroxyanisole 2%, the balance is pure water.

(5) Dry the shredded carrots in the dryer for the first time, the drying temperature is 80°C, and the drying time is 30 minutes. After the first drying is completed, immediately spread the shredded carrots evenly on a clean flat ground to dry , so that the shredded carrots emit hot steam and cool down as soon as possible, the time is 30 minutes; put the shredded carrots in the dryer for the second drying, the drying temperature is 70 ° C, the time is 25 minutes, and the second drying is completed After that, immediately spread the shredded carrots evenly and thinly on a clean flat ground to let the shredded carrots emit hot steam and cool down as soon as possible. The time is 25 minutes; at 60°C for 20 minutes, after the third drying, spread the shredded carrots evenly and thinly on a clean flat ground to dry, so that the shredded carrots can emit hot steam and cool down as soon as possible. The time is 20 minutes to get the water content Carrot shreds with less than 10%; the drying is hot air circulation drying, and the carrot shreds are dried 8 times in the dryer each time.

(6) Put the sterilized dried shredded carrots into the packaging machine for vacuum packaging.

(7) Put the packaged shredded carrots into a cobalt-60 irradiation device to irradiate the shredded carrots with γ-rays at a dose of 8kGy.

Example 2

(1) Select fresh carrots, first cut off the top leaves and root tails of carrots, and then put them into a peeler for peeling.

(2) Put the peeled carrots into the rolling washing machine, and roll them with clean water to remove the soil and impurities.

(3) Put the cleaned carrots into the shredded machine, and cut the carrots into evenly sized carrot shreds.

(4) Put shredded carrots into the color protection solution immediately, and immediately pick up the shredded carrots after being completely submerged. The composition and mass percentage of the color protection solution are: 3% tea polyphenols, 2% erythorbic acid, inositol six Phosphoric acid 1% and butyl hydroxyanisole 1%, the balance is purified water.

(5) Dry the shredded carrots in the dryer for the first time at 60°C for 28 minutes. After the first drying is completed, immediately spread the shredded carrots evenly on a clean flat ground to dry , so that the shredded carrots emit hot steam and cool down as soon as possible, the time is 25 minutes; put the shredded carrots in the dryer for the second drying, the drying temperature is 55 ° C, the time is 22 minutes, and the second drying is completed After that, spread the carrot shreds evenly and thinly on a clean flat ground immediately, so that the carrot shreds can emit hot steam and cool down as soon as possible, and the time is 20 minutes; put the carrot shreds in the dryer for the third drying, and the drying temperature at 45°C for 15 minutes, after the third drying, spread the shredded carrots evenly and thinly on a clean flat ground to dry, so that the shredded carrots can emit hot steam and cool down as soon as possible. The time is 10 minutes, and the water content can be obtained Carrot shreds below 10%; the drying is hot air circulation drying, and the carrot shreds are dried 6 times in the dryer each time.

(6) Put the sterilized dried shredded carrots into the packaging machine for vacuum packaging.

(7) Put the packaged shredded carrots into a cobalt-60 irradiation device to irradiate the shredded carrots with gamma rays at a dose of 6kGy.

Example 3

(1) Select fresh carrots, first cut off the top leaves and root tails of carrots, and then put them into a peeler for peeling.

(2) Put the peeled carrots into the rolling washing machine, and roll them with clean water to remove the soil and impurities.

(3) Put the cleaned carrots into the shredded machine, and cut the carrots into evenly sized carrot shreds.

(4) Throw shredded carrots into the color-protecting solution immediately, and immediately pick up the shredded carrots after being completely submerged. The ingredients and mass percentages of the color-protecting solution are: 4% tea polyphenols, 3% erythorbic acid, inositol six Phosphoric acid 2% and butyl hydroxyanisole 1%, the balance is purified water.

(5) Dry the carrot shreds in the dryer for the first time, the drying temperature is 75°C, and the drying time is 28 minutes. After the first drying is completed, immediately spread the carrot shreds evenly on a clean flat ground to dry , so that the shredded carrots emit hot steam and cool down as soon as possible, the time is 25 minutes; put the shredded carrots in the dryer for the second drying, the drying temperature is 60 ° C, the time is 15 minutes, and the second drying is completed After that, immediately spread the shredded carrots evenly and thinly on a clean flat ground, so that the shredded carrots can emit hot steam and cool down as soon as possible. The time is 18 minutes; at 40°C for 10 minutes, after the third drying, spread the shredded carrots evenly and thinly on a clean flat ground to let the carrots emit hot steam as soon as possible and cool them down for 15 minutes to get the water content Carrot shreds below 10%; the drying is hot air circulation drying, and the carrot shreds are dried 5 times in the dryer each time.

(6) Put the sterilized dried shredded carrots into the packaging machine for vacuum packaging.

(7) Put the packaged shredded carrots into a cobalt-60 irradiation device to irradiate the shredded carrots with γ-rays at a dose of 4kGy.

Claims (3)

1. a processing method of dried shredded carrots, characterized in that: comprising peeling, cleaning, shredding, color protection, drying, packaging and sterilization: Described peeling is to select fresh carrots and first cut off the top leaves and root tails of carrots, and then put them into a peeling machine to peel off the epidermis; The cleaning is to put the peeled carrots into a rolling washing machine, and roll and clean them with clear water to remove soil and impurities; The shredded method is to put the cleaned carrots into a shredding machine, and cut the carrots into evenly sized shredded carrots; The color protection is to put shredded carrots into the color protection solution immediately, and immediately pick up the shredded carrots after being completely submerged. The composition and mass percentage of the color protection solution are: tea polyphenol 3-5%, isoascorbic acid 2% -4%, phytic acid 1-2% and butylated hydroxyanisole 1-2%, the balance is pure water; Described drying is three times of hot air circulation drying; Described packing is that dried shredded carrot is put into packing machine and carries out vacuum packing; The sterilization is radiation sterilization, and the packaged shredded carrots are put into a cobalt-60 irradiation device to irradiate the shredded carrots with 4-8kGy gamma rays. 2. the processing method of dried carrot shreds according to claim 1, is characterized in that: described carrot shreds drying process is as follows three times: For the first drying, put the shredded carrots in a dryer at a temperature of 50-80°C for 15-30 minutes. After the first drying, immediately spread the shredded carrots evenly on a clean Spread it on the flat ground to make the shredded carrots emit hot steam and cool down as soon as possible, the time is 20-30 minutes; For the second drying, place the shredded carrots in the dryer at a temperature of 45-70°C for 10-25 minutes. After the second drying, immediately spread the shredded carrots evenly on a clean Spread it on a flat ground to let the shredded carrots emit hot steam and cool down as soon as possible. The time is 15 to 25 minutes; For the third drying, place the shredded carrots in a dryer at a temperature of 40-60°C for 10-20 minutes. After the third drying, immediately spread the shredded carrots evenly on a clean Spread it on the flat ground to make the shredded carrots emit hot steam as soon as possible and cool them down for 10 to 20 minutes to obtain shredded carrots with a moisture content of less than 10%. 3. the processing method of dried carrot shreds according to claim 1, is characterized in that: described drying is hot air circulation drying, and each drying carrot shreds carries out 5-8 cycle drying in dryer .